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TPS60151DRVT 데이터시트(PDF) 9 Page - Texas Instruments |
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TPS60151DRVT 데이터시트(HTML) 9 Page - Texas Instruments |
9 / 22 page APPLICATION INFORMATION APPLICATION OVERVIEW VBUS GND CP- VIN VOUT GND CP+ ENA USB Transceiver Controller Comparator D+ ID D- VIN=2.7V-5.5V C3 2.2 F m C1 2.2 F m C2 1 F m 5V 50mA (VIN>2.7V) 140mA (VIN>3.3V) CP- VIN VOUT GND CP+ ENA ENABLE VIN=2.7V~5.5V C3 2.2 F m C1 2.2 F m C2 1 F m 50mA (VIN>2.7V) 140mA (VIN>3.3V) BASIC OPERATION PRINCIPLE TPS60151 www.ti.com ......................................................................................................................................................................................... SLVSA02 – SEPTEMBER 2009 Most of today’s battery-powered portable electronics allow and/or require data transfer with a PC. One of the fastest data transfer protocols is via USB On the Go (OTG). As Figure 20 shows, the USB OTG circuitry in the portable device requires a 5-V power rail and up to 140mA of current. The HDMI specification calls for a 5-V power rail that can source 55mA or more current. The TPS60151 may be utilized to provide a 5-V power rail in a battery powered system. Alternatively, low-cost portable electronics with small LCD displays require a low-cost solution for providing the WLED backlight. As shown in Figure 21, the TPS60151 can also be used to drive several WLEDs in parallel, with the help of ballast resistors. Figure 20. Application Circuit for OTG System Figure 21. Application Circuit for Driving White LEDs The TPS60151, regulated charge pump, provides a regulated output voltage for various input voltages. The TPS60151 regulates the voltage across the flying capacitor to 2.5V and controls the voltage drop of Q1 and Q2 while a conversion clock with 50% duty cycle drives the FETs. Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Link(s) :TPS60151 |
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